Steel extractor



Patented Oct. 6, 1925.

UNITEDS'T'ArnS onARLEfs A. .'ZETIGE, `or sroKANE, WASHINGTON.

' STEEL EXTRACTOR.

Appneationf'ied october 1, 1924. serial Nafrliiarfe.` J

' f To all whom t may concern:

Beit known that'I, CHARLIE-SIA. ZEJGE, a citizen of the `United States, residing lat Spokane, in the county of vSpokane and State of'lVashington, have invented'new and useful Improvements in Steel AExtractors, of which the following is aspecification. 1

v'This invention' relates to improvements in extracting tools. y

It is a special objectfof this inventionto provide a tool for withdrawing a bound drill steel from a hole. It is well'known that when a steelfbecomes bound, or in the parlance of the miner, stucklnot only the drill is lost, butffar more important, the whole round of holes is lost.

@ne of the special featuresof my invention resides in `an extracting tool having an open bore extendingy throughout the length thereof Vwhereby 'the extractor can -be telescoped onto the projectingend of a 'bound drill steel. i

A furtherfeature 'ofnov'elty resides in animproved meansfor engaging or gripping the steel, wherebymy improved extractor may be interposed between the formation and said means for exerting an ex tracting'thrust lengthwise of the steel to withdraw the latter from the formation.

My invention has many other features and objects which will be more fully described in connection with the accompanying drawing, and which will be more particularly set forth and pointed out in and by the appended claim.

In the drawing Fig. 1, is a sectional view through a partof a formation in which a drill steel is bound, and illustrating the manner of applying my improved extractor to the projecting .end thereof.

Fig. 2, is a view in elevation of my extractor on an enlarged scale, showing the same applied to a drill steel. Y

Fig. 3, is a longitudinal sectional view of the same.

Fig. 4. is a sectional view on line of Fig. 3.

Fig. 5, is a side view of the gripper head.

Like characters of reference designate similar parts throughout the different figures of the drawing.

As illustrated. the formation is indicated by 1, and the drill steel at 2. When the operating means is removed from the steel,

there'fis-alwaysa certain amount of projection which is 'indicated at 3, between the terminal end 4L of the steelvand the breast or face 5 of .theformation i Next describing' theV structure 4constituting my invention, 6 designates one of a pair 'i of coacting companion members which is inA they formv of a-sleeve' having a hollow base 7 for abut-ment against thebreast 5. It will be lnoted that the-'base 7, vwhich is annular in form, is somewhat enlarged with respect yto the cylindrical portion 6. Said portion 6, `has a bore 8, of a diameter sufciently *enlarged `with respect to thetdrill to telescope thel drill 2 with suitable clearance,`

the, form of a sleeve and is provided withV internal threads 1,1,.forV engagement .with

The bore 8, Ais, preferably smooth l" the' threads 9 of' the base sleeve 6., 'The di portionl, to which'a wrench may be applied torotatesleeve 10. The extreme outer end 14, is shaped to form a swivelling surface for engagement with my novel gripper means, which I will presently describe. The edge 15, of the base section is preferably continuously smooth and flat, which form, in practice, is most effective as it finds a plurality of points of anchorage contact with the face 5. In case of necessity, however, a wedge may be inserted where there is not suiiicient plane surface against which the base may contact in a stable manner. As the base section 6, does not rotate, and as the section 10, is positively actuated, I will refer to the former as the base section and the latter as the operating section.

I will next describe my improved gripping means.

Said means isin the form of a substantially flat member 16, having a laterally projecting handle portion 17. An opening 18 is formed in said gripper and the axis of said opening is at an acute angle to the plane of said gripper thereby forming gripping edges 19 and 20. l

The operation of my improved device is as follows When a drill is removed from the proliecting end of a bound steel, I first telescope over the end of the steel, the united base and operating sections adjusted to a llO starting position substantially as shown in Fig. 3. I next slip the gripper 16, over the end of the drill steel, as shown by dotted lines in Fig. 2, and move the gripper into engagement With the svvivelling face 14. A Wrench is then applied to the hexagonal portion 13 and a turning movement is imparted to the operating section 10. As seotion 10 is turned, the extracting tool is end- Wise lengthened, and the base 7, 'riotionally impinges .against the breast, Work or formation, whatever it may be, and the svvivelling face straightens the gripper from the inclined position shown in dotted lines to the full line position shown in Fig. 2. By reason of the fact that the bore 18 is formed with its axis at an acute or oblique angle to the plane of the gripper, the latter Will not pass over the steel unless disposed in the position shown in dotted lines. I-Ience, When pressure is applied Vto change the position of the gripper into the full line position, the edges 19 and 20, Will bite against the `drill steel so lirmly that the gripper Will remain stationary and positively hold the steel. This will be true even after the relatively `sharp edges 19 and 20, have been dulled.

My invention also resides in the method of extracting bound .drill steel which oon sists in applying thrust against the formation and against the steel to Withdraw the latter.

While I have herein shovvn and described one specific Jform of my invention, I do not Wish to be limited thereto except for such limitations as the claim may import.

A steel extractor comprising a jack formed of telescoping tubular members ooaotingly threaded substantially throughout their respective lengths and adapted When in a starting position to have a major preponderanoe of their threads in ooaoting engagement to distribute the load on substantially all the threads and shorten and stitlen the jack against distorting strains, the bore of the inner member permitting the jack to be teleseoped onto the projecting end of the steel with the base of one member against the formation and the free end of the other member inside of the terminal end of the steel, an initially loose vgripper on the projecting end of the steel endWise outside of said jack and adapted to be manually adjusted against the free end of the latter, and said jack having means whereby said tubular members may be relatively turned to lengthen said jack into endvvise annular abutting sWivelled yengagement against and energize said gripper into rigid non-rotative and longitudinally fixed engagement with said steel during extracting of the latter, whereby an exclusively straight pull is exerted on the steel Without imparting rota.- tive or angular distortion thereto.

In testimony that I claim the foregoing as my oivn, I hereby atix my signature.

CHARLES A. ZEIGE. 

